Hand-lamp.



C. P. BURGESS.

BAND LAMP.

APPLICATION FILED s119113, 1913.

Patented Jan. 20, 1914.

llllllll'llll land the spring socket detached from the-v Iniurnp STATES PA i CHARLES r. annesse, or MADISON, wisconsin.

'i Hann-LAMP.

Patented dan'. 20, 1914.

Application med'septembenla, 1913. serial No. 789,595. y.

To all whom it may concern:

Be it known that I, CHARLES F. Bimenes, a citizen of the United States,.residing at Madison, in ,the county of Dane and'State of lVisconsin, have invented new and use-` may be focused or may be dispersed more orv less as desired, the conductive parts at that end of the lamp being adequately insulated against accidental connection with other conductive parts of the structure.

It is a further object to arrange the contact device and a removable closure for the end of the casing in such relation as to permit'ready removalv of the batteries, and to afford other special advantages which will be made apparent by the detailed description hereinafter given.

In the drawings, forming a part of this specification, Figure 1 'is a sectional eleva- ;tion through the complete lamp; and Fig. 2 is an exploded view showing the lens .tube

corresponding ends of the lamp casing.

In the structure illustrated, the device comprises a casing 1 of insulating material such as fiber or the like within which may be introduced a plurality of battery cells 2 and 3 .inclosed in a paste board jacket 4. Cell 3 has its naked zinc container resting on the central elect-rode 5 of cell 2, and the central electrode 6 of' cell 3 contacts with the inner terminal of the incandescent lamp 7 The outer terminal or sleeve othe lamp socket is threaded into the tubular extension 8 of the reflector 9. which is in the form ot'a` cup with a cylindrical .side wall which is turned over at the top ed'fge to form a flange 10 seated against the adjacent end of the fiber tube 1. The reflector is electrically connected with a'metal strip 11* by means of solder applied at 12 through a lnarrow notch cut in the end of the fiber tube 1, and this conductor 11 extends back approximately to the middle of the ber down to form a lug 13 at which electrical connection with the lamp `may be establishedp l As a means for establishing the electrical connection .to the lamp, I make use of a spring contact device not herein claimed,

this device comprising a housing 14 pressed up from sheet metal and having side flanges through which the rivets 15 may be passed for securing the housing to the fiber casing 1. One of these rivets may serve to establish electrical connection between this housing and a metal strip 16 extending loning 1 and a flange on the edge of a metal ring 18 reinforcing the end of the casing and held in position by rivets 19 which project outward to :form retaining lugs. Cooperating with these lugs and secured in position thereby is a cup-shaped socket 20, having a bayonet joint with a rounded recess 21 for locking -engagement with lugs 19. This socket 20 contains a helically coiled spring 22 which normally bears against the zinc electrode of cell 2 and establishes electrical connection therewith.

lVith the several parts arranged as above described, there is a -complete electrical circuit from the battery through the lamp, ext-.1` .cept :for the gap between lu 13 and housing 14: To bridge this gap t ere is provided within housing 14 a s i ing contact member 23 having one of its legs positioned to slide .along the exterior of the fiber casing, and

having its other leg bearing against the in- .,ner face of housing 14; A pinand thumb piece 24 project through a slot in housing 1-1 and afford a means for sliding the Contact when the thumb piece is pushed inward and forward by the operator. A lock is provided to prevent accidental sliding of the Contact member and consists of an outlturned lug 25 on the Contact member projecting through a slot in the housing member as shown in the drawings, so that sliding movement of the contacter is impossible unless the thumb piece is pushed mward at the same time it is being pushed forward. This protects the lamp against accidental lighting when slipped into or out of the pocket of the user.

The means whereby the focal length of the beam of lightmay be shifted includes a lens 26 cemented at .27 to the flanged end of a seamless" metal cylinder 28, slidingly sift: 1,os4,eae

mounted on the liber tube and telescoping with respect thereto to shift lens 26 with respect to lamp 7 and its reflect-or 9. The lens in conjunction With the cylindrical reflector and the telescoping relation of the tubes afford means for focusing the light at a short distance from the lamp or for spreading it out as a divergent beam for illuminating a wide area.

It is important that there should be no electrical connection between the lens supporting t-ube 28 and the reflector and other metal parts at the lamp end of the casing,

and to this end the ring 10 of the reflector does not extend out as far as the exterior ot the fiber tube. Similarly, the pin or rivet- 29, which may be used to assist the soldered strip 12 in holdingr reflector 9 in the end of the casing, does not extend far enough to contact with the lens tube 28. As the resultl of the electrical insulation ot' tube 28, accidental connection of that with housing 14 will not light the lamp. In fact there is no exposed part which can be accidentally connected to any other part to cause inadvertent lighting of the lamp. This is an important feature, for it has often happened Withother lamps of this general type that when placed in abox or bag with tools, or thrown into a Wire mail basket, the lamp Wou-ld light up with its thumb contacter open, and thus might completely wear out its batteries to no useful purpose.

I claim:

1. In a battery hand lamp, the combination of an insulating casing, batteries and a lamp mounted therein, a focusing lens for said lamp and a tubular support for said lens and to Which it is permanently attached, said support being mounted directly on the fiber tube and insulated thereby and adapted to slide thereon in changing the Jfocus of the light from the lamp.

2. In a battery hand lamp, an insulating casing, batteries and a lamp. therein, a ren Hector and a lens for said lamp, and a tubular support for said lens slidin ly mounted on said casing to change the tocus of the light, and insulated from said reflector to.

avoid accidental lighting of the lamp.

3. In a tubular hand lamp, the combination of a cylindrical casing, a lamp and re- Hector positioned at one end of said casing,

a contact device near the center of said cas-k of said casing, conductors leading from said contact device to said reflector and to said spring, respectively, a lens for said lamp and a lens support enveloping said reflector and its conductor and insulated therefrom to prevent accidental lighting of the lamp through accidental connection` of those parts with other parts of the device.

A tubular battery lamp, comprising an insulating casing, batteries therein, a contact device carried by said casing, a metal closure for one end of said casing in elect-rical connection With said batteries and said conta vct device, a lamp at the other end of the casing, a reflector and a lens for saidlamp, and a tubular support in which said lens is permanently mounted, said support being slidingly mounted onsaid casingand electrically insulated from the conductive parts at the lamp end of the casing.

In testimony whereof I affix my signature, in presence of two Witnesses.

CHARLES F. BURGESS.

W'itnesses:

W. B. SCHULTE, LORENZ MARSEL. 

